An estimated 10,000 people attended the annual "Circa--In Seventh Heaven" event, a multistage dance concert with dozens of deejays, at the Olympic. Fire officials ordered the concert shut down after they responded to an emergency call and found four people who had stopped breathing.

As the event broke up, revelers scuffled with police, who fired rubber bullets to disperse the crowd. Party-goers rocked an MTA bus and threw stones and bottles at police officers and patrol cars. The melee lasted until 1:30 a.m.